Paper-pulping engine



May 14, 1929. WI WERNE-R 1,712,598

' PAPER PULPING ENGINE Filed Jan; 20, 1927 Patented May 14, 1929.

"UNITED STATES WALTER: WERNER, or Hoosrcx rants,

1,712,598 PATENT] OFFICE.

NEW ironic, nssrenon 'ro arm NOBLE a WOOD MACHINE ('10., OF HOOSICK FALLS, NEW-YORK, A COBPDRATION OF NEW YORK.

rerun-Pursues ENGINE.

Application filed January 20, 1927. "swarm. 162,289.

My present invention relates to paper pulping engines, and the object of my invention is to produce a simple, efficient continuous paper pulping engine, provided with means whereby that part of the paper which has been reduced to the desired fineness will automatically beextracted from the tubof the engine over or through. the upper part thereof, thus permitting the continuous introduction of fresh stock thereinto,and preventing the re-working of that stock which has already been reduced to the desired condition. A further object is to extract the fined stock from the tub while the sameis being circulated, and without changing the general direction of how or normal circulation thereof around or in the tub.

With these objects in View, my present invention consists primarily in the peculiar combination, relative arrangement, and design of the more or less well known devices whereby l have accomplished by objects and attained the desired results, and is illustrated in the accompanying drawings, in which:

Fig. l is a plan view of my improved continuous paper pulping engine, cover removed. I

Fig. 2 is a side elevation, parts broken away.

Fig. 3 is a detail of the separating racl: or screen.

The same reference characters refer to the same parts throughout the several views.

Referring to the drawings, which it is to be understood are in a certain sense illustrative only, it will be observed that my improved continuous" paper pulping engine consists of atub2 provided with a midfeather 3, and adapted to receive thestoclc which is to be reduced to pulp and which may consistof books, bundles of newspapers, or baled paper trimmings and the like. The

- tub 2 is, of course, to be supplied with the till - necessary water. I w

Mounted 'n the tub d is a paddle wheel 4:, and a. whipp'er 5, each of which is'provided with some suitable means whereby it may be forcibly rotated each at the required speed. lln Fig. l of thedrawings these means are indicated as a driving pulley 8 secured on the shaft of the whipper, the paddle wheel being driven from said shaft by a chain drive 7, driving through an intermgdiaw shaft 9, the gears being so proportioned that the speed atwhich the paddle wheel 4 will be rotated is less than the'speed of the whipper 5. The paddle wheel 4 is mounted in the tub 2, and is so proportioned that the blades thereof extend from curb to midfeather and when rotateddip deeply into the.

tub and so induce the water and stock contained therein to be circulated thereabout. The blades on the paddle wheel 4 are preferably set at an angle to the radii of the wheel, substantially as illustrated in Fig. 2, so that when they leave the water any stock which may be in contact with them will be readily discharged from the wheel and little, if any of it be carried over with or by the blades.

Mounted in the tub 2, preferably immediately behind the paddle wheel 4 is a whipper 5, which consists of a hub or core projecting from and spaced about which are a series of spokes 6. The whipper 5' is to be driven at a comparatively high speed, con-- siderably higher tliahthat at which the paddle wheel a is driven.

Behind and in close proximity to the whipper 5 is a separating rack or screen 10, which consists of a series of rather-closely spaced bars, l0", pendent from a supporting bar 10 'llhe pendent bars may be straight vertical till bars, but ll prefer to curve them in the one plane somewhat as shown in Fig. 2 of the drawings, the curve approximating, that which experience has shown to be proper deflecting curves as used on the hood over the revolving members of such engines.

Immediately behind the screen l0, and just above the normal level of the stock bein circulated in the tub, is mounted a trougi 12, the forward side of which is comparatively low. The bottom of this trough tilts down toward the discharge end, which in the drawings is shown as being at the opposite side of the tub, but either end of the trough may be the discharge end; and if desired means {not shown) may be supplied whereby a flushing stream of water will be introduced into the other end of thetrou h.

The operation of no improve continuous beating engine is as ollows: An amount of stock to be beaten, together with the necessary wateris introduced into the tub, sufficient tohll it to the usualworkmg level.

'- Powerthen being applied the paddle wheel 4 and whipper 5 are rotated and quickly cause the contents of the tub to circulate around the midfeather, and during each circuit the same will be beaten by both the paddle wheel 4 and the whipper 5. The whipper 5 being driven at a comparatively high speed will not only beat the wet paper into a pulp but will also whip it up against the separating rack or screen and'a large percentageof such pulp as has been reduced to a sufiiciently fined state will pass through the separator and enter the trough 12 and so be carried out of the tub. The water which splashed or whipped up by the whipper is usually suflicient to insure the flow of the fined stock out of the trough by way of the discharge end thereof. Any parts of the stock which are too coarse to pass the screen will drop back, or be washed back' into the tub and be passed around until it' too has been reduced to the desired condition or fineness, and will in turn pass through the screen.

- From this described operation it will be evident that as the stock in the tub is reduced to the required fineness it will auto matically be extracted therefrom without being subjected to excessive working and that this continual extraction of the stock as soon as it has been suflicientl fined, will permit the continual addition 0 fresh stock to the tub so that the operation thereof may be continued indefinitely without excessive working of any of the stock which hasbeen deposited in the tub. It will also be evident that any of the coarser stock which may be whipped against the separating rack will, if it does not fall. of its own weight, be washed off the pendent bars by the continual splash of the water under the urge of the whipper 5.

While no mention has heretofore been made of. a string catcher, this being an appliance which is very-generally used in such beating tubs as here described, the use of such a device is contemplated.

I claim: V

1. In a tpaper pulping engine, the combi nation wi a tub having a midfeather, and a propeller adapted to cause circulation of water and stock in the tub, of a rotating whipping device comprising a hub with a multiple series of radiallspaced'arms projeeting therefrom and a apted to beat and whip up stock floating near and on the surin trough mounted above said normal level. be d, and a short distance beyond the end of the arms of said whipping device and adapted to collect water and stock projected by said whipping device and automatimlly deliver it outside of the tub; and a forklike separating rack interposed between said whipping device and said trough whereby stock which has not been reduced to the desired fineness will be prevented from entering said trough.

2. In a paper pulping engine, the combination with a tub having a midfeather, and a propeller adapted to cause circulation of water and stock contained in the tub, of a rotatable whipping device adapted to beat and whip up stock floating near and on the surface of the water in the tub and to project it above the normal level thereof; an extracting trough mounted above said normal level, behind, and in juxtaposition to the periphery of said whipping device and adapted to receive water and stock projected thereby and automatically deliver'it outside of the tub; and a fork-like separating rack interposed between said whipping device and said trough whereby stock not sufficiently fined will be prevented from entering said trough.

3. A continuous paper ulping engine comprising a tub with a mid feather; a propelling device whereby water and stock placed in said tub Will-be caused to circulate; a whippin device whereby stock floating near or on th be beaten and whi ped, and projected above the normallevel oi the water; an extracting trough located above said normal level, behind and in juxtaposition to the periphery of said whipping device and adapted to catch stock and water projected by said device and automatically deliver it outside of said tub; and a pendent fork-like separating device ahead of said trou h and across the ath of the water and stoc projected by said whipping device.

4. In a paper pulping engine, a tub, a propeller operating therein, an extracting trough arranged above the normal level of the stockfloa-t' in the tub, a whipping device operating iehtween the propeller and said trough, and a separating rack interposed between thewhipping device and trough for the purpose specified.

In testimony whereof I have afiixed my e surface of the water will 

